There are total 18 hours or 1080 minutes from 7am to 1am. In words, this duration is equal to eighteen hours or one thousand eighty minutes.
How many hours from
| 1PM to 10AM | 10PM to 9PM | 12AM to 11PM |
| 11PM to 7PM | 9PM to 6AM | 7PM to 9AM |
| 11AM to 4AM | 1PM to 7PM | 6AM to 9PM |
| 4AM to 4PM | 11PM to 3PM | 3AM to 4AM |
| 3PM to 7PM | 1AM to 5AM | 2PM to 10PM |
| 10PM to 7PM | 4PM to 3AM | 7PM to 8AM |
